I have been plannin on buying some 625cc injectors from a guy on the forum for $300 shipped. But, then I bought a boost controller from a guy and he told me he has 550cc injectors for $200 shipped.

So my questions is, is it worth it to go bigger injectors right now since I do plan on building the motor before the end of this year/early next year.

But, when do 550s max out past there safe duty cycle. I plan to have 300hp on 8-10psi daily. Then plan to have high boost around 330, I guess. Would 550s be around their limit at these power levels.

 

550cc should do it.... too big is not alwayz make you faster

 

Ok. But what about when I get done building a motor and I want about 400hp+ would the 550s still be straight.

 

no 400 hp plus, you will be needing like 750 cc injectors

 

Yea, I am planning on going 750CC plug and play for 450WHP, hope that's good enough.

 

should be enough, jeff (318_tc) i think had those when he hit 400s on his gt3076 tt kit

 

Shh... ;-)

Jeff actually had 880cc injectors.

 

You can't just guesstimate what size injectors you need...theres a formula somewhere online (too lazy to look for it lol) but it will tell you what size injectors you'll need for X amount of HP you're planning on reaching.

 

I am sure there are other factors too.

 

well there is many who are pushing around the 300whp area that are using 550's so you should just use those for now, until your built dream comes alive.. you can save that 100 for something else.. like the tune for your turbo..

 

Ok thanks. I feel bad now for backing out on the 625s cuhz, i bought from him b4. But, Im tryin to save a lil money where its not necessary for spending more.

 

Fuel injector calculator:
http://www.deatschwerks.com/catalog/...alculators.php

have at it